.navigation{
    width: 270px;
    margin: 20px auto 30px auto;
    text-align: left;    
}
.navigation label{
    font-family: Arial,Helvetica,sans-serif;
    padding: 5px 20px;
    position: relative;
    z-index: 20;
    display: block;
    height: 30px;
    cursor: pointer;
    color: #777;
    text-shadow: 1px 1px 1px rgba(255,255,255,0.8);
    line-height: 33px;
    font-size: 19px;
    background: #ffffff;
    box-shadow: 
            0px 0px 0px 1px rgba(155,155,155,0.3), 
            1px 0px 0px 0px rgba(255,255,255,0.9) inset, 
            0px 2px 2px rgba(0,0,0,0.1);
}

#nav1{
    border-top-left-radius:20px;
    border-top-right-radius:20px;
    -webkit-border-top-left-radius:20px;
    -webkit-border-top-right-radius:20px;
}
.navigation label:hover{
    background: #fff;
}
.navigation input:checked + label,.navigation input:checked + label:hover{
    background: #c6e1ec;
    color: #3d7489;
    text-shadow: 0px 1px 1px rgba(255,255,255, 0.6);
    box-shadow: 
            0px 0px 0px 1px rgba(155,155,155,0.3), 
            0px 2px 2px rgba(0,0,0,0.1);
}
.navigation label:hover:after,.navigation input:checked + label:hover:after{
    content: '';
    position: absolute;
    width: 24px;
    height: 24px;
    right: 13px;
    top: 7px;
    background: transparent url(images/arrow_down.png) no-repeat center center;	
}
.navigation input:checked + label:hover:after{
    background-image: url(images/arrow_up.png);
}
.navigation input{
    display: none;
}
.navigation article{
    background: rgba(255, 255, 255, 0.5);
    margin-top: -1px;
    overflow: hidden;
    height: 0px;
    position: relative;
    z-index: 10;
    -webkit-transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
    -moz-transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
    -o-transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
    -ms-transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
    transition: height 0.3s ease-in-out, box-shadow 0.6s linear;
}
.navigation article li{
    list-style: square;
    padding: 15px;
}
.navigation article a{
    text-decoration: none;
    font-style: italic;
    color: #777;
    line-height: 23px;
    font-size: 20px;
    padding: 10px;
    text-shadow: 1px 1px 1px rgba(255,255,255,0.8);
}
.navigation input:checked ~ article{
    -webkit-transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
    -moz-transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
    -o-transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
    -ms-transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
    transition: height 0.5s ease-in-out, box-shadow 0.1s linear;
    box-shadow: 0px 0px 0px 1px rgba(155,155,155,0.3);
}

.navigation input:checked ~ article.small{
    height: 110px;
}

.navigation input:checked ~ article.small1{
    height: 55px;
}
.navigation input:checked ~ article.medium{
    height: 160px;
}
